Add a Touchdown localization pipeline (#15054)

This commit introduces a localization pipeline that submits our
localizable content to Touchdown, the modern localization service we
should have been using the whole time.

The pipeline is scheduled to run after the end of the workday around 6-7
PM Pacific (depending on daylight saving time) if there have been any
code changes on main.

Some of our localizable files were out of spec, so I moved them into the
right places and the right format.

.github/actions/spell-check/expect.txt

@@ -308,6 +308,7 @@ CREATEWINDOWFAILED
 cref
 critsec
 crlf
+cron
 Crossdevice
 CRSEL
 crutkas
@@ -346,6 +347,7 @@ CXVIRTUALSCREEN
 cxxopts
 CYSMICON
 CYVIRTUALSCREEN
+czf
 cziplib
 Dac
 dacl
@@ -1384,6 +1386,7 @@ PARENTRELATIVEPARSING
 parray
 PARTIALCONFIRMATIONDIALOGTITLE
 pathcch
+Pathto
 PAUDIO
 pbc
 Pbgra
@@ -1474,6 +1477,7 @@ printf
 prm
 proactively
 PROCESSKEY
+PRODEXT
 PRODUCTVERSION
 Progman
 programdata
@@ -1892,6 +1896,7 @@ taskschd
 tchar
 tcscpy
 TCustom
+tdbuild
 TDevice
 tellg
 Templated